Safety razor with double reciprocating blades



Oct. 18, 1949;

H. O- MATHlE SAFETY RAZOR WITH DOUBLE RECIPROCATING BLADES Filed Feb. 2, 1948 IINVENTOR, J mu Q 7724*???26;

Patented Oct. 18,1949

SAFETY RAZOR WITH DOUBLE RECIPROCATIN G BLADES Harold 0. Mathie, Monterey Park, Calif.

Application February 2, 1948, Serial No. 5,845

14 Claims. (01. '3043) This invention is a shaving razor of double, reciprocating bladed assembly, motor driven type.

It has been proposed to provide safety razors with a thin, toothed blade and to reciprocate the blade longitudinally by one form of motor or another.

A purpOSe of the present invention is to provide a simple, practical, reliable, rugged and eflicient double, reciprocative bladed razor and means whereby the blades are concurrently, contrarily shifted one on the other.

A further intent of the invention is to provide a safety razor having cooperative, toothed edge blades in direct sliding engagement and concurrently motivated through suitable drive connections with a unidirectionally rotary drive shaft.

Another object of the invention is to provide a motor-driven, multi-bladed razor in which the driven blades can be quickly detached fromthe main, handle-forming, bearing head to facilitate occasional cleaning thereof, that isthe blades without removal of any of the driving elements, and, further, to provide for the ready oiling and cleaning of certain of the drive elements, at infrequent intervals.

Also the invention aims to provide motor driven shaving blades which are each reversible edge for edge and are of low cost so that new replacements can be economically made from time to time.

The invention has the important objective of providing afool-proof, motorized, double, reciprocative bladed, safety razor.

Importantly, it is in the ken of the invention to provide a double, reciprocative bladed razor both edges of the pair of blades being exposed at all times, during use of the razor, so that either edge of the pair may be applied to the bearded face or other skin surface at will.

The invention resides in certain advancements in this art as set forth in the ensuing disclosure and has, with the above, additional objects and advantages as hereinafter developed, and whose constructions, combinations and details of means and manner of operation will be made manifest in the following description of the herewith illustrative embodiment; it being understood that modifications, variations and adaptations may be resorted to within the scope, spirit and principles of the invention as it is claimed in conclusion hereof.

Figure 1 is a side elevation of the razor. Figure 2 is a plan and Figure 3 is a blade end elevation of the razor. Figure 4 is a somewhat enlarged end view of the cap, blades and comb combination.

Figure 5 is a plan of the bottom face of the cap, and Figure 6 is a central, transverse section thereof. Figure '7 is an elevation of the cap screw.

Figure 8 is a plan, and Figure 9 is an end View, of the outer shaving blade. Figure 10 is a plan of the inner shaving blade.

Figure 11 is a plan of the outer face of the comb.

. Figure 12 is an elevational section of the body of the razor head and the blade driving mechanism. Figure 13 is a plan of cam gears of the driving mechanism.

Figure 14 is a top plan of the upper drive plate, and Figure 15 is a like view of the lower drive plate of the razor mechanism.

The razor embodies a casing 2, having a head end 3, of such size and design to be comfortably gripped in'either hand of the user for functional sweep of a head cap 4 over a bearded or other hairy skin to be shaved. Journaled in the casin is a drive shaft 5 driven by an electric or other suitable motor.

A suitable, simple form of blade reciprocating means here includes a pinion 5;) on the outer end of the shaft 5 and which constantly meshes with twin g'ears B and l on diametrically opposite sides thereof. Each of these gears has an eccentric cam slot 8 in its outer, end face, Fig. 13.

These gears are operatively countersunk in an end pocket 9 of the head 3 and have shafts l0 journaled in the head. Slidably fitted along the longitudinal walls of the pocket is a pair of substantial drive plates II and [2; the inner plate i2 lapping on the ends of the gears B and I, and the outer plate ll lapping on the plate l2. Both of theplates are shorter than the length of the pocket 9 to provide for relatively contrary longitudinal reciprocation of the two plates.

The inner plate l2 has a fixed cam pin I2p to closely but operatively fit in the cam groove or slot 8 of the gear 6 and has a rigid, upwardly projecting post i225 passing up through a central, elongate slot I is in the upper plate I l and having an internal thread to receive a cap screw l3, Fig. 7; The plate I I' has a downwardly projecting cam pin l lp to closely but operatively fit in the respective cam slot 8 in the gear I the pin I lp working in a clearance slot [25 in one end of the plate l2. The plates II and I2 set into the head pocket 9 and are retained in working position by a covering comb l4 having a row of slots Us to clear the upstanding post [2t and a pair of longitudinally spaced, upstanding lugs Ila rigid with the plate II. The comb i4 is removably secured 'rake into the surface hair.

. 3 to the end of the head 3 by small screws l5 screwing into the end face of the head.

The cutting means includes a pair of co-extensive inner and outer blades l6 and I1 respectively, each having their two longitudinal edges suitably provided with bevelled cutting teeth 18. The outtherewith outward bearing holes l-Bh to snugly fit the relative, drive lugs Ila of the plate II. It will be seen from the foregoing that the plates H and I2 are limited in the pocket 9 of the head to simple longitudinal motion--contrariwise--by their driving cam gears 6 and 1, while drive post Hi and the lugs I la reciprocate in the central row of slots Ms in the comb l4 so that there is no turning torque imparted to the superimposed blades I6 and I? which are impaled on and reciprocated by the post and the lugs mentioned.

Means are provided to removably clamp the pair of nested blades 16 and Il with desired pressure on the bedding comb l4 affixed to the head 3 and to cover the top ends of the post l2t and of the lugs I la. This means includes the cap screw l3 and an elongate cap element 4 having a central hole 4h for the cap screw; the outer face of the cap being transversely crowned as shown' in Fig. 6. This cap is somewhat narrower than the cutting blades so that the cutting teeth can The cap is confined to a simple endwise reciprocating action with the outer blade I! by means of alined guide channels 2| formed in the bottom face of the cap to operatively receive the ends of the lugs Ila..

As shown in Fig. 4 the sides of the comb stand outwardly from the toothed edges of the cutting blades to guard against rake of the teeth digging into the skin but allowing the hair to work into position to be clipped by the teeth of the blades as these are concurrently and oppositely shifting on the stationary comb, and as the razor isbodily gradually and smoothly dragged over the skin to be shaven.

. What is claimed is:

1. A motor powered safety razor including a body structure, a comb fixed across one endof the structure, a plurality of cutting blades nested one on the other and bedded on the comb, and a cap removably retaining the blades in operative position on the comb, and drive means in the body structure for reciprocating the blades on the comb.

2. The razor of claim 1; said means relativel reciprocating the blades.

' 3. The razor of claim 1; said cap being reciprocative as a unit with one of the blades.

4. The razor of claim 1; said means concurrently shifting the blades contrariwise.

5. A motorized safety razor including a casing structure, a comb fixed across one end of the said structure, a pair of nested cutting blades bedded on the comb, a presser cap retaining the cutters in bedded, operative position, and motor driven, drive parts in the casing structure for the individual blades.

6. The razor of claim 5'; and a driven, drive means common to said parts and by which they are concurrently, contrarily reciprocated.

I 7. The razor of claim 5; one of the said parts holding; the blades to rectilinear motion on the comb.

8. A-motorized, safety razor having a casing structure, acomb fixed across one end of said structure, a pair of nested cutting blades bedded on: the comb, reciprocative plates operatively guided in said structure and interlocked to respective, individual blades to concurrently reciprocate the blades, and a. retainer cap pressing the blades to the comb and being attached to one of the plates. to reciprocate with its driven blade.

9. The razor of claim 8; and a motor powered mechanism in the said structure for concurrently, contrarily reciprocating said plates for motivating their blades.

10. The razor of claim 9; said mechanism including a rotary device for each of the plates, and a common driver for said devices.

:11. The razor of claim 8; and means including rotary cams for the individual plates and a common. driver for the cams.

12. The. razor of claim 8; and means in the casing structure including cam slotted gears interlocked to respective plates to reciprocate them, and a common driving pinion for the ears to eii'ect their concurrent, reverse direction of rotation respectively and the concurrent, contrary reciprocation of the plates and their blades.

13. The razor of claim 8; and by which said plate the cap is held against shift on the next adjacent blade.

14. In a safety shaving razor having nested cutting blades, means for relatively and concurrently reciprocating the blades and including cam grooved wheels having a common driver, nested drive plates with pins to engage in respective wheel grooves, and devices respectively connecting the plates to the blades for reciprocating them relatively.

' HAROLD O. MATHIE.

REFERENCES CITED The following references. are of record in the file of this patent:

UNITED STATES. PATENTS 

